See the selection manual (perldoc Geo::Postcodes::Selection or man Geo::Postcodes::Selection) for usage details, and the tutorial (perldoc Geo::Postcodes::Tutorial or man Geo::Postcodes::Tutorial) for sample code.

The latest version of this library should always be available on CPAN, but see also the library home page; http://bbop.org/perl/GeoPostcodes for additional information and sample usage. The child classes that can be found there have some sample programs.